Radiant heating element with a metal foil heat conductor
AssigneeDiehl AKO Stiftung & Co. KG
InventorsGunter Dittmar, Josef Hecht, Gunther Wildner
Life of this patent
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Abstract
A radiant heating body for a cooking hob has a heating conductor comprising a metal foil and an insulating bottom (12). To make the heating conductor easy to fit and to provide advantageous heat radiation properties the flat geometrical heating conductor pattern is separated out of the metal foil. The pattern forms heating limbs (1) whose large surface is towards the cooking hob and which are held at least at an outer annular rim (13) of the insulating bottom (12).
Claims59
A radiant heating body for a cooking hob, in particular a glass ceramic cooking hob, having a heating conductor comprising a metal foil and an insulating bottom under the heating conductor, wherein the heating conductor is separated out of said metal foil and extends in a geometrical pattern between the cooking hob and the insulating bottom, the heating conductor pattern forming heating limbs (1) of a thickness which is substantially smaller that their width and whose large surface is directed upwardly, said heating limbs being held at least at an outer annular rim (13) of the insulating body (12), the outer annular rim (13) being formed by an annular raised outer zone (14) of the insulating bottom (12) and an annular portion (15) which is fitted onto the outer zone and which comprises a thermally an electrically insulating material, and wherein said heating limbs include outer holding tongues (2) engaging between the outer zone (14) and the annular portion (15).
A radiant heating body for a cooking hob, in particular a glass ceramic cooking hob, having a heating conductor comprising a metal foil and an insulating bottom under the heating conductor, wherein the heating conductor is separated out of said metal foil and extends in a geometrical pattern between the cooking hob and the insulating bottom, the heating conductor pattern forming heating limbs (1) of a thickness which is substantially smaller that their width and whose large surface is directed upwardly, said heating limbs being held at least at an outer annular rim (13) of the insulating body (12), the underside of the heating limbs (1), which faces towards the insulating body (12) freely extending at least partially at a spacing above the insulating bottom (12), outer and inner holding tongues (2, 4, 8, 28) being shaped out of the metal foil in the plane of the geometrical pattern, said outer holding tongues (2) being formed at least at outer locations of the geometrical pattern and are held to the outer annular rim (13) of the insulating (12), the outer and inner holding tongues (2, 4, 8, 28) being held on the insulating bottom (12) by means of a holding portion (15, 19, 30), the inner holding tongues (8) being arranged inwardly disposed locations of the flat geometrical pattern of the heating conductor and the inner holding tongues (8) being held to a support portion (17) of the insulating bottom (12);
- and the inner holding tongues (8) being held to the support portion (17) by a holding part (19) which is fixed to the support portion (17).
Dependencies are inferred from the claim text.